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Title: Polycarbonate compositions having improved flame retardance and improved water vapor transmission

Abstract: Improved flame retardance and improved water vapor transmission are imparted to high molecular weight aromatic polycarbonate resins by selecting appropriate diphenols and controlling the degree to which these particular diphenols are halogenated.


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Inventors: Mark, Victor (Evansville, IN, US)
Hedges, Charles V. (Mt. Vernon, IN, US)

Application Number: 882126
Filing Date: 1978-02-28
Publication_date: 1980-01-08
Assignee: General Electric Company (Pittsfield, MA)
Primary Class(es): 528/202 528/205, 568/722, 568/726
Other Classes:
US Patent Ref:
3028365Apr, 1962Schnell260/47.
3062781Nov, 1962Buttenbruch260/47.
3991120Nov, 1976Ladd260/613.

Other Refs:
Primary Examiner: Pertilla, Theodore E.
Assistant Examiner:
Attorney: Mitri; Salvatore C., Mufatti; William F.